Ks7003 - Miyako area [Hiraiga Fm]: Late Aptian, Japan
collected by Kase
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Bivalvia
- Carditida
- Astartidae
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Astarte (Trautscholdia) minor
Lea 1833
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Bivalvia
- Trigoniida
- Megatrigoniidae
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Gastropoda
- Nododelphinulidae
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Nododelphinula hiraigensis n. sp.
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Gastropoda
- Turbinidae
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| see common names | |||||||
Geography
| Country: | Japan |
| Coordinates: | 39.9° North, 141.9° East (view map) |
| Paleocoordinates: | 48.2° North, 151.2° East (Wright 2013) |
| Basis of coordinate: | based on nearby landmark |
| Geographic resolution: | outcrop |
Time
| Period: | Cretaceous | Epoch: | Early Cretaceous |
| 10 m.y. bin: | Cretaceous 2-3 | ||
| Key time interval: | Late Aptian | ||
| Age range of interval: | 119.57 - 113.2 m.y. ago |
Stratigraphy
| Formation: | Hiraiga | ||||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: STRATIGRAPHIC RELATIONS: From the Hiraiga Fm. AGE: Late Aptian; justification for age not reported in text. STRATIGRAPHIC POSITION: Lower cycle of the lower part of the Hiraiga Fm. | |||||
Lithology and environment
| Primary lithology: | bioturbation,medium,nodular lithified calcareous sandstone |
| Secondary lithology: | fine lithified silty sandstone |
| Includes fossils? | Y |
| Lithology description: SPECIFIC LITHOLOGY: Bioturbated and calcareous medium-grained sandstone about 80 cm in thickness, interbedded between upper silty fine-grained sandstone and lower coquinal sandstone; traces of crawling or unidentified organisms abundantly occur along with stratification. LITHIFICATION: Lithified, on the basis of figured specimens. | |
| Environment: | marine indet. |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
Collection methods and comments
| Collection methods: | field collection |
| Reason for describing collection: | taxonomic analysis |
| Collectors: | Kase |
| Collection method comments: COLLECTOR: T. Kase. REPOSITORY: Not stated in text. | |
| Taxonomic list comments:COVERAGE: Exhaustive for gastropods; other taxa (namely bivalves and foraminifera) often present. NOMENCLATURE: Authoritative publication, with relatively modern nomenclature, and species-resolution identifications. | |
Metadata
| Database number: | 91256 | ||
| Authorizer: | A. Hendy | Enterer: | A. Hendy |
| Modifier: | A. Hendy | Research group: | marine invertebrate |
| Created: | 2009-09-13 16:57:03 | Last modified: | 2025-02-22 15:12:02 |
| Access level: | the public | Released: | 2009-09-13 16:57:03 |
| Creative Commons license: | CC0 |
Reference information
Primary reference:
| 30704. | T. Kase. 1984. Early Cretaceous marine and brackish-water Gastropoda from Japan 1-262 [A. Hendy/A. Hendy] |